|Party|Previous council|Staying councillors|Seats up for election|Election result|New council|
|---|---|---|---|---|---|
|Conservatives|29|19|10|8|28|
|Labour|19|13|6|10|23|
|Socialist Alternative|3|2|1|0|2|
|Liberal Democrats|2|1|1|0|1|
|British National Party|0|0|0|0|0|
|Green|0|0|0|0|0|
|Independent|0|0|0|0|0|
|Respect|0|0|0|0|0|
|Total|54|36|18|18|54|

Question: how many parties had zero councils?
Answer: 4